{
  "$type": "site.standard.document",
  "description": "A cylinder block structure with a small number of ribs is provided which can favorably prevent the deformation of a crankshaft bearing portion and the like. In a cylinder block 1 having bolt holes 3 formed on the upper surface for connecting a cylinder head with bolts, arc-shaped coupling surfaces…",
  "path": "/patents/1078540",
  "publishedAt": "2005-04-13T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02F7/00",
    "AICHI MACHINE IND [JP]"
  ],
  "textContent": "A cylinder block structure with a small number of ribs is provided which can favorably prevent the deformation of a crankshaft bearing portion and the like. In a cylinder block 1 having bolt holes 3 formed on the upper surface for connecting a cylinder head with bolts, arc-shaped coupling surfaces 5 formed on the rear end surface for mounting a housing, such as a transmission housing, and a crankshaft bearing portion 6 formed in the central part between the lower ends of the coupling surfaces: the upper parts of the coupling surfaces 5 are joined into an arch-shape by an arch-shaped rib 7; the lower ends of right and left bosses 4 respectively having bolt hole 3 formed therein, are extended and connected to the lower parts of the arch-shaped rib 7; and right and left main radial ribs 10, respectively extend from the outside of the lower end of the bolt hole boss 4 to the center of the crankshaft bearing portion 6.",
  "title": "Cylinder block structure"
}